diff --unified --recursive --new-file fasm-1.52/source/expressi.inc fasm-1.53/source/expressi.inc
--- fasm-1.52/source/expressi.inc	2004-05-06 10:52:54.000000000 +0200
+++ fasm-1.53/source/expressi.inc	2004-06-23 10:53:00.000000000 +0200
@@ -1323,37 +1323,47 @@
 	xor	[ebx+4],eax
 	jmp	calculation_loop
       xor_byte:
-	cmp	dword [edi+4],0
-	jne	xor_qword
-	cmp	word [edi+2],0
-	jne	xor_qword
-	cmp	byte [edi+1],0
-	jne	xor_qword
+	mov	eax,[edi+4]
+	or	eax,[ebx+4]
+	jnz	xor_qword
+	mov	eax,[edi]
+	or	eax,[ebx]
+	and	eax,not 0FFh
+	jnz	xor_qword
 	mov	al,[edi]
 	xor	[ebx],al
 	jmp	calculation_loop
       xor_word:
-	cmp	dword [edi+4],0
-	jne	xor_qword
-	cmp	word [edi+2],0
-	jne	xor_qword
+	mov	eax,[edi+4]
+	or	eax,[ebx+4]
+	jnz	xor_qword
+	mov	ax,[edi+2]
+	or	ax,[ebx+2]
+	jnz	xor_qword
 	mov	ax,[edi]
 	xor	[ebx],ax
 	jmp	calculation_loop
       xor_dword:
-	cmp	dword [edi+4],0
-	jne	xor_qword
+	mov	eax,[edi+4]
+	or	eax,[ebx+4]
+	jnz	xor_qword
 	mov	eax,[edi]
 	xor	[ebx],eax
 	jmp	calculation_loop
       xor_pword:
-	cmp	word [edi+6],0
-	jne	xor_qword
+	mov	ax,[edi+6]
+	or	ax,[ebx+6]
+	jnz	xor_qword
 	mov	eax,[edi]
 	xor	[ebx],eax
 	mov	ax,[edi+4]
 	xor	[ebx+4],ax
 	jmp	calculation_loop
+      shr_negative:
+	not	dword [edi]
+	not	dword [edi+4]
+	add	dword [edi],1
+	adc	dword [edi+4],0
       calculate_shl:
 	mov	eax,dword [edi+4]
 	bt	eax,31
@@ -1409,12 +1419,6 @@
 	mov	[ebx],eax
 	mov	dword [ebx+4],0
 	jmp	calculation_loop
-      shr_negative:
-	not	dword [edi]
-	not	dword [edi+4]
-	add	dword [edi],1
-	adc	dword [edi+4],0
-	jmp	calculate_shl
       zero_value:
 	mov	dword [ebx],0
 	mov	dword [ebx+4],0
diff --unified --recursive --new-file fasm-1.52/source/formats.inc fasm-1.53/source/formats.inc
--- fasm-1.52/source/formats.inc	2004-05-06 10:52:54.000000000 +0200
+++ fasm-1.53/source/formats.inc	2004-06-23 10:53:00.000000000 +0200
@@ -553,8 +553,9 @@
 	shl	ecx,9
 	sub	ecx,eax
 	movzx	eax,word [esi+2]
-	add	ecx,eax
 	mov	edx,edi
+	add	ecx,eax
+	jz	read_stub_code
 	push	ecx
 	dec	ecx
 	shr	ecx,3
@@ -566,6 +567,7 @@
 	xor	eax,eax
 	rep	stos dword [edi]
 	pop	ecx
+     read_stub_code:
 	call	read
 	call	close
 	mov	edx,edi
@@ -2359,7 +2361,7 @@
 	mov	[ebx+4],eax
 	mov	[ebx+8],edi
 	mov	al,4
-	mov	[ebx+10h],al
+	mov	[ebx+10h],eax
 	mov	al,111b
 	mov	[ebx+14h],eax
 	mov	[current_section],ebx
diff --unified --recursive --new-file fasm-1.52/source/preproce.inc fasm-1.53/source/preproce.inc
--- fasm-1.52/source/preproce.inc	2004-05-06 10:52:54.000000000 +0200
+++ fasm-1.53/source/preproce.inc	2004-06-23 10:53:00.000000000 +0200
@@ -1453,7 +1453,6 @@
 	or	[macro_status],al
 	pop	[counter_limit] [counter]
 	pop	[macro_block_line_number] [macro_block_line] [macro_block] [macro_constants]
-
 	jmp	line_preprocessed
 
 include_file:
diff --unified --recursive --new-file fasm-1.52/source/version.inc fasm-1.53/source/version.inc
--- fasm-1.52/source/version.inc	2004-05-06 10:52:54.000000000 +0200
+++ fasm-1.53/source/version.inc	2004-06-23 10:53:00.000000000 +0200
@@ -1,5 +1,5 @@
 
-; flat assembler  version 1.52
+; flat assembler  version 1.53
 ; Copyright (c) 1999-2004, Tomasz Grysztar.
 ; All rights reserved.
 ;
@@ -33,7 +33,7 @@
 ; cannot simply be copied and put under another distribution licence
 ; (including the GNU Public Licence).
 
-VERSION_STRING equ "1.52"
+VERSION_STRING equ "1.53"
 
 VERSION_MAJOR = 1
-VERSION_MINOR = 52
+VERSION_MINOR = 53
diff --unified --recursive --new-file fasm-1.52/source/x86.inc fasm-1.53/source/x86.inc
--- fasm-1.52/source/x86.inc	2004-05-06 10:52:54.000000000 +0200
+++ fasm-1.53/source/x86.inc	2004-06-23 10:53:00.000000000 +0200
@@ -5297,6 +5297,8 @@
 	je	mmx_imm8
 	jmp	instruction_assembled
       sse_xmmreg_xmmreg:
+	cmp	[mmx_prefix],66h
+	jne	sse_xmmreg_xmmreg_ok
 	cmp	[extended_code],12h
 	je	invalid_operand
 	cmp	[extended_code],16h